[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.122' (ECDSA) to the list of known hosts. 2021/04/29 02:52:43 fuzzer started 2021/04/29 02:52:44 connecting to host at 10.128.0.169:43409 2021/04/29 02:52:44 checking machine... 2021/04/29 02:52:44 checking revisions... 2021/04/29 02:52:44 testing simple program... syzkaller login: [ 76.652746][ T8412] chnl_net:caif_netlink_parms(): no params data found [ 76.707790][ T8412] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.717071][ T8412] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.729485][ T8412] device bridge_slave_0 entered promiscuous mode [ 76.742019][ T8412] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.752185][ T8412] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.763170][ T8412] device bridge_slave_1 entered promiscuous mode [ 76.788245][ T8412] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.804739][ T8412] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.830199][ T8412] team0: Port device team_slave_0 added [ 76.838854][ T8412] team0: Port device team_slave_1 added [ 76.859944][ T8412] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.869598][ T8412] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 76.899915][ T8412] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.914573][ T8412] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.923338][ T8412] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 76.963160][ T8412] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.995620][ T8412] device hsr_slave_0 entered promiscuous mode [ 77.005099][ T8412] device hsr_slave_1 entered promiscuous mode [ 77.115688][ T8412] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.136119][ T8412] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.155676][ T8412] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.167979][ T8412] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.203315][ T8412] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.213199][ T8412] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.224995][ T8412] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.234490][ T8412] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.285076][ T8412] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.302749][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.318952][ T4832] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.330964][ T4832] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.342654][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.361641][ T8412] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.376442][ T4920] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.386257][ T4920] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.395004][ T4920] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.409965][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.422302][ T4832] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.431475][ T4832] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.463425][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.475869][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.487601][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.500018][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.516688][ T8412] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.533896][ T8412] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.548105][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.571300][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.582030][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.598307][ T8412] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.622330][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.648827][ T8412] device veth0_vlan entered promiscuous mode [ 77.657480][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 77.669287][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.681331][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.691230][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.705795][ T8412] device veth1_vlan entered promiscuous mode [ 77.729631][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.738955][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.750055][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.763881][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.779689][ T8412] device veth0_macvtap entered promiscuous mode [ 77.798978][ T8412] device veth1_macvtap entered promiscuous mode [ 77.821574][ T8412] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.832645][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.844217][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.856570][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.867758][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.884866][ T8412] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.895097][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.906576][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.922153][ T8412] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.933463][ T8412] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.945285][ T8412] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.956582][ T8412] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.058510][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.072015][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.103163][ T167] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.106053][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.113782][ T167] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.132838][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/29 02:52:47 building call list... [ 78.788230][ T167] ------------[ cut here ]------------ [ 78.815264][ T167] hook not found, pf 3 num 0 [ 78.815913][ T167] WARNING: CPU: 1 PID: 167 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 78.837208][ T167] Modules linked in: [ 78.844093][ T167] CPU: 1 PID: 167 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0 [ 78.856658][ T167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.871370][ T167] Workqueue: netns cleanup_net [ 78.878321][ T167] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.889772][ T167] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.915896][ T167] RSP: 0018:ffffc9000160fbc0 EFLAGS: 00010286 [ 78.924494][ T167] RAX: 0000000000000000 RBX: ffff888021750b00 RCX: 0000000000000000 [ 78.935394][ T167] RDX: ffff888011edb880 RSI: ffffffff815c5205 RDI: fffff520002c1f6a [ 78.946817][ T167] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.959561][ T167] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888018a50f20 [ 78.969089][ T167] R13: 0000000000000000 R14: ffff88801caab100 R15: 0000000000000001 [ 78.981035][ T167] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 78.992188][ T167] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.004370][ T167] CR2: 00007f26c8e38000 CR3: 0000000016ea9000 CR4: 00000000001506e0 [ 79.014355][ T167] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.026060][ T167] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.043940][ T167] Call Trace: [ 79.048070][ T167] nf_unregister_net_hooks+0x117/0x160 [ 79.058105][ T167] arpt_unregister_table_pre_exit+0x67/0x80 [ 79.066958][ T167] ? arptable_filter_net_exit+0x20/0x20 [ 79.075891][ T167] cleanup_net+0x451/0xb10 [ 79.082208][ T167] ? ops_free_list.part.0+0x3d0/0x3d0 [ 79.088647][ T167] process_one_work+0x98d/0x1600 [ 79.099273][ T167] ? pwq_dec_nr_in_flight+0x320/0x320 [ 79.106431][ T167] ? rwlock_bug.part.0+0x90/0x90 [ 79.119371][ T167] ? _raw_spin_lock_irq+0x41/0x50 [ 79.125688][ T167] worker_thread+0x64c/0x1120 [ 79.134013][ T167] ? process_one_work+0x1600/0x1600 [ 79.141587][ T167] kthread+0x3b1/0x4a0 [ 79.146513][ T167] ? __kthread_bind_mask+0xc0/0xc0 [ 79.155805][ T167] ret_from_fork+0x1f/0x30 [ 79.161913][ T167] Kernel panic - not syncing: panic_on_warn set ... [ 79.169865][ T167] CPU: 1 PID: 167 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0 [ 79.179915][ T167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.191670][ T167] Workqueue: netns cleanup_net [ 79.197773][ T167] Call Trace: [ 79.202482][ T167] dump_stack+0x141/0x1d7 [ 79.207357][ T167] panic+0x306/0x73d [ 79.211654][ T167] ? __warn_printk+0xf3/0xf3 [ 79.216498][ T167] ? __warn.cold+0x1a/0x44 [ 79.221115][ T167] ? __nf_unregister_net_hook+0x1eb/0x610 [ 79.227574][ T167] __warn.cold+0x35/0x44 [ 79.232243][ T167] ? __nf_unregister_net_hook+0x1eb/0x610 [ 79.238765][ T167] report_bug+0x1bd/0x210 [ 79.244535][ T167] handle_bug+0x3c/0x60 [ 79.249585][ T167] exc_invalid_op+0x14/0x40 [ 79.254317][ T167] asm_exc_invalid_op+0x12/0x20 [ 79.259437][ T167] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 79.265953][ T167] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 79.286051][ T167] RSP: 0018:ffffc9000160fbc0 EFLAGS: 00010286 [ 79.293163][ T167] RAX: 0000000000000000 RBX: ffff888021750b00 RCX: 0000000000000000 [ 79.305165][ T167] RDX: ffff888011edb880 RSI: ffffffff815c5205 RDI: fffff520002c1f6a [ 79.317553][ T167] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 79.328283][ T167] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888018a50f20 [ 79.338542][ T167] R13: 0000000000000000 R14: ffff88801caab100 R15: 0000000000000001 [ 79.349754][ T167] ? wake_up_klogd.part.0+0x8e/0xd0 [ 79.357332][ T167] ? vprintk_func+0x95/0x1e0 [ 79.362760][ T167] nf_unregister_net_hooks+0x117/0x160 [ 79.370190][ T167] arpt_unregister_table_pre_exit+0x67/0x80 [ 79.379130][ T167] ? arptable_filter_net_exit+0x20/0x20 [ 79.385947][ T167] cleanup_net+0x451/0xb10 [ 79.392369][ T167] ? ops_free_list.part.0+0x3d0/0x3d0 [ 79.398240][ T167] process_one_work+0x98d/0x1600 [ 79.404252][ T167] ? pwq_dec_nr_in_flight+0x320/0x320 [ 79.411425][ T167] ? rwlock_bug.part.0+0x90/0x90 [ 79.417688][ T167] ? _raw_spin_lock_irq+0x41/0x50 [ 79.423460][ T167] worker_thread+0x64c/0x1120 [ 79.429389][ T167] ? process_one_work+0x1600/0x1600 [ 79.434957][ T167] kthread+0x3b1/0x4a0 [ 79.439597][ T167] ? __kthread_bind_mask+0xc0/0xc0 [ 79.445366][ T167] ret_from_fork+0x1f/0x30 [ 79.453900][ T167] Kernel Offset: disabled [ 79.461119][ T167] Rebooting in 86400 seconds..